56 lines
816 B
C++
56 lines
816 B
C++
#include <kernel/SpinLock.h>
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#include <kernel/Thread.h>
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namespace Kernel
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{
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extern "C" void spinlock_lock_asm(int*);
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extern "C" void spinlock_unlock_asm(int*);
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void SpinLock::lock()
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{
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spinlock_lock_asm(&m_lock);
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}
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void SpinLock::unlock()
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{
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spinlock_unlock_asm(&m_lock);
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}
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bool SpinLock::is_locked() const
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{
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return m_lock;
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}
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void RecursiveSpinLock::lock()
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{
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// FIXME: is this thread safe?
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if (m_locker == Thread::current().tid())
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{
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m_lock_depth++;
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}
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else
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{
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m_lock.lock();
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ASSERT(m_locker == 0);
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m_locker = Thread::current().tid();
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m_lock_depth = 1;
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}
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}
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void RecursiveSpinLock::unlock()
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{
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m_lock_depth--;
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if (m_lock_depth == 0)
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{
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m_locker = 0;
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m_lock.unlock();
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}
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}
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bool RecursiveSpinLock::is_locked() const
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{
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return m_lock.is_locked();
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}
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} |